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Sherlock is following N criminals, which are right now in a 2D grid. Each criminal at t=0, decides to move in a certain fixed direction. Each criminal moves with the same speed. These fixed directions are North, East, West and South. Two or more criminals, however, vanish whenever they meet at any place at the same time, t>0. You have to tell what is the final number of criminals left at t=infinit

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solution.cppC++17

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